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