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