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