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