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