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)(17,18,22,23,21,25,19,26)(20,28,30,32,29,24,27,31)(1,3,4,8)(2,5,6,7)(9,10)(11,14)(12,13)(15,16)(17,19,21,22)(18,23,25,26)(20,27,29,30)(24,31,28,32)(2,6)(3,8)(10,13)(14,15)(17,20)(18,24)(19,27)(21,29)(22,30)(23,31)(25,28)(26,32) involution — undirected(2,6)(3,8)(9,11,12,16)(10,14,13,15)(20,29)(24,28)(27,30)(31,32)(2,6)(5,7)(18,25)(23,26)(24,28)(31,32) 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.