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