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