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