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