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