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