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