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