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