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)(21,32)(24,36)(25,34)(28,40)(29,41)(31,43)(33,38)(37,46)(42,48)(44,47) involution — undirected(1,3)(2,6)(4,11)(5,9)(7,15)(8,13)(10,12)(14,16)(17,18,21,26,22,23,32,35)(19,24,27,38,29,33,41,36)(20,25,31,39,30,34,43,45)(28,37,40,47,42,44,48,46)(3,9)(6,13)(10,11)(14,15)(17,19,21,27,22,29,32,41)(18,24,26,38,23,33,35,36)(20,28,31,40,30,42,43,48)(25,37,39,47,34,44,45,46)(1,4,5,12)(2,7,8,16)(3,10,9,11)(6,14,13,15)(17,20)(18,25)(19,28)(21,31)(22,30)(23,34)(24,37)(26,39)(27,40)(29,42)(32,43)(33,44)(35,45)(36,46)(38,47)(41,48)(2,8)(6,13)(7,16)(14,15)(19,29)(20,30)(24,33)(25,34)(27,41)(31,43)(36,38)(39,45) 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.