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