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