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