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