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