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