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