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