One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,9)(6,7)(8,11)(10,12)(13,14)(15,16)(17,18,23,22)(19,24,26,20)(21,29,31,25)(27,28,30,32)(33,34)(35,41)(36,44)(37,38)(39,43)(40,46)(42,47)(45,48)(2,7)(4,8)(9,14)(12,15)(17,19)(18,24)(20,22)(21,30)(23,26)(25,28)(27,31)(29,32)(33,35)(34,39)(36,45)(37,41)(38,43)(40,48)(42,46)(44,47) involution — undirected(5,13)(9,14)(10,16)(12,15)(18,22)(19,26)(25,29)(27,30)(33,34,38,37)(35,39,43,41)(36,40,46,44)(42,47,45,48)(1,3)(2,8)(4,7)(5,10)(6,11)(9,15)(12,14)(13,16)(17,20)(18,19)(21,28)(22,26)(23,24)(25,27)(29,30)(31,32)(33,36)(34,40)(35,42)(37,44)(38,46)(39,47)(41,48)(43,45) involution — undirected(1,4,6,8)(2,3,7,11)(5,12,13,15)(9,10,14,16)(17,21,23,31)(18,25,22,29)(19,27,26,30)(20,28,24,32)(33,37,38,34)(35,39,43,41)(36,44,46,40)(42,47,45,48)(1,5)(2,9)(3,10)(4,12)(6,13)(7,14)(8,15)(11,16)(17,22,23,18)(19,20,26,24)(21,29,31,25)(27,28,30,32)(33,35)(34,41)(36,42)(37,39)(38,43)(40,48)(44,47)(45,46)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.