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)(19,29)(20,21)(22,39)(25,43)(26,27)(28,42)(30,34)(32,33)(35,36)(37,40)(41,46)(44,48)(45,47) involution — undirected(4,13)(8,12)(9,16)(11,14)(17,18,23,28)(19,25,33,48)(20,24,36,42)(21,37,35,26)(22,40,39,27)(29,47,32,46)(30,45,34,41)(31,43,38,44)(1,3)(2,6)(4,14)(5,10)(7,15)(8,16)(9,12)(11,13)(17,19)(18,25)(20,34)(21,38)(22,32)(23,33)(24,41)(26,43)(27,47)(28,48)(29,39)(30,36)(31,35)(37,44)(40,46)(42,45) involution — undirected(2,7)(6,15)(8,12)(9,16)(17,20,22,35,23,36,39,21)(18,26,27,24,28,37,40,42)(19,30,32,38,33,34,29,31)(25,44,47,45,48,43,46,41)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.