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