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