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