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)(26,34)(28,37)(29,36)(30,38)(31,39)(32,41)(33,35)(40,45)(42,47)(43,48)(44,46) involution — undirected(1,3,5,11)(2,6,7,15)(4,13,14,10)(8,16,12,9)(17,19,22,28)(18,23,27,37)(20,29,32,42)(21,33,34,30)(24,38,26,35)(25,36,41,47)(31,44,45,43)(39,48,40,46)(1,2)(3,6)(4,8)(5,7)(9,10)(11,15)(12,14)(13,16)(18,24)(19,28)(21,34)(23,35)(25,39)(26,27)(29,42)(31,45)(36,46)(37,38)(40,41)(47,48) involution — undirected(2,7)(6,15)(8,12)(9,16)(17,20,22,32)(18,25,27,41)(19,29,28,42)(21,31,34,45)(23,36,37,47)(24,39,26,40)(30,43,33,44)(35,46,38,48)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.