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