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