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)(11,15)(12,13)(14,16)(18,22)(20,28)(23,26)(27,31)(33,34,38,41)(35,39,36,43)(37,45,46,40)(42,48,44,47)(3,8)(5,7)(9,11)(10,14)(12,15)(13,16)(18,22)(19,25)(24,29)(27,31)(33,35,38,36)(34,39,41,43)(37,42,46,44)(40,47,45,48)(11,16)(14,15)(17,18)(19,26)(20,24)(21,22)(23,25)(27,32)(28,29)(30,31)(33,36,38,35)(34,39,41,43)(37,44,46,42)(40,47,45,48)(1,3)(2,5)(4,8)(6,7)(9,11)(10,15)(12,14)(13,16)(17,19,21,25)(18,23,22,26)(20,27,28,31)(24,30,29,32)(33,34)(35,39)(36,43)(37,40)(38,41)(42,47)(44,48)(45,46)(1,2)(3,5)(4,6)(7,8)(9,12,13,10)(11,14,16,15)(17,20,21,28)(18,24,22,29)(19,27,25,31)(23,30,26,32)(33,37,38,46)(34,40,41,45)(35,42,36,44)(39,47,43,48)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.