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