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