One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,6)(5,12)(7,11)(8,14)(10,15)(13,16)(17,18)(19,26)(20,29)(21,24)(22,28)(23,25)(27,31)(30,32)(33,34)(35,39)(36,41)(37,44)(38,43)(40,46)(42,48)(45,47) involution — undirected(2,4)(7,9)(8,12)(15,16)(17,19)(18,22)(20,30)(21,27)(23,28)(24,32)(25,26)(29,31)(33,35,38,46)(34,39,43,40)(36,44,47,42)(37,45,48,41)(1,3)(2,7)(4,9)(5,10)(6,11)(8,15)(12,16)(13,14)(17,20,23,21)(18,24,25,29)(19,27,28,30)(22,31,26,32)(33,35)(34,40)(36,44)(37,45)(38,46)(39,43)(41,48)(42,47)(1,3)(2,7)(4,9)(5,13)(6,11)(8,16)(10,14)(12,15)(17,19)(18,22)(20,27)(21,30)(23,28)(24,31)(25,26)(29,32)(33,36)(34,41)(35,44)(37,39)(38,47)(40,48)(42,46)(43,45) involution — undirected(1,4,6,2)(3,9,11,7)(5,12,14,8)(10,16,13,15)(17,21,23,20)(18,24,25,29)(19,27,28,30)(22,32,26,31)(33,35)(34,40)(36,44)(37,45)(38,46)(39,43)(41,48)(42,47)(1,5)(2,8)(3,10)(4,12)(6,14)(7,15)(9,16)(11,13)(17,22)(18,19)(20,31)(21,32)(23,26)(24,27)(25,28)(29,30)(33,37,38,48)(34,42,43,44)(35,45,46,41)(36,40,47,39)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.