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