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