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