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