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