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