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