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