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