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