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