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