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