One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(10,14)(11,12)(19,27)(20,31)(24,28)(30,32) involution — undirected(1,3,5,4)(2,6,7,8)(9,10,13,14)(11,16,12,15)(17,18,22,26)(19,28,27,24)(20,30,31,32)(21,25,23,29)(1,4,5,3)(2,6,7,8)(9,11,13,12)(10,15,14,16)(17,19,22,27)(18,24,26,28)(20,25,31,29)(21,32,23,30)(9,11,13,12)(10,15,14,16)(17,20,21,28,22,31,23,24)(18,19,29,32,26,27,25,30)(2,7)(6,8)(9,12,13,11)(10,15,14,16)(17,21,22,23)(18,25,26,29)(19,30,27,32)(20,28,31,24)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.