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