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)(25,36)(27,38)(28,43)(29,30)(34,35)(37,42)(39,44)(40,41)(45,46) involution — undirected(17,18,24,38,22,27,21,23)(19,25,30,40,31,41,29,36)(20,33,32,37,35,26,34,42)(28,44,46,47,45,39,43,48)(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)(23,36)(24,30)(26,39)(27,41)(32,46)(33,44)(34,43)(35,45)(37,47)(38,40)(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)(21,34)(22,35)(23,37)(24,32)(25,39)(27,33)(29,43)(30,46)(31,45)(36,47)(38,42)(40,48)(41,44)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.