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