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