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