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