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