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