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