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