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