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