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