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