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