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