One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(3,10)(4,5)(8,15)(9,13)(11,12)(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)(3,8)(4,13)(5,7)(6,9)(10,14)(11,15)(12,16)(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)(1,3,5,10,6,11,4,12)(2,8,7,14,9,15,13,16)(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)(2,9)(3,11)(7,13)(10,12)(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.