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