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