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