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