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)(11,13)(12,14)(15,16)(17,18)(19,24)(20,25)(21,26)(22,29)(23,27)(28,32)(30,31) involution — undirected(1,3,5,4)(2,6,8,7)(9,11,12,15)(10,13,14,16)(17,19,23,29)(18,22,27,24)(20,25,28,32)(21,26,31,30)(1,3,5,4)(2,7,8,6)(10,14)(13,16)(17,20)(18,25)(19,21)(22,30)(23,28)(24,26)(27,32)(29,31)(1,4,5,3)(2,6,8,7)(17,21,23,31)(18,26,27,30)(19,28,29,20)(22,25,24,32)(17,22,23,24)(18,19,27,29)(20,26,28,30)(21,25,31,32)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.