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