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