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