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