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