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