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