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