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