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