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