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