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