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