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