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