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)(17,18,22,26)(19,28,32,45)(20,25,34,24)(21,36,29,27)(23,37,40,31)(30,44,33,43)(35,41,46,42)(38,47,39,48)(2,5)(6,7)(9,10)(11,14)(12,13)(15,16)(17,19,29,37,22,32,21,31)(18,23,36,45,26,40,27,28)(20,33,46,47,34,30,35,48)(24,39,42,43,25,38,41,44)(1,3,4,8)(2,6,5,7)(10,13)(14,16)(17,20)(18,24)(19,30)(21,35)(22,34)(23,38)(25,26)(27,41)(28,43)(29,46)(31,47)(32,33)(36,42)(37,48)(39,40)(44,45)(10,13)(14,16)(17,20)(18,25)(19,30)(21,35)(22,34)(23,39)(24,26)(27,42)(28,44)(29,46)(31,47)(32,33)(36,41)(37,48)(38,40)(43,45) involution — undirected(9,11,12,15)(10,14,13,16)(18,26)(20,34)(23,40)(27,36)(28,45)(30,33)(35,46)(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.