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