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