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