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)(17,18,21,25,22,26,28,31)(19,27,30,32,29,23,20,24)(1,3)(2,6)(4,7)(5,8)(9,10)(11,15)(12,14)(13,16)(17,19)(18,23)(20,28)(21,30)(22,29)(24,25)(26,27)(31,32) involution — undirected(1,2,5,4)(3,6,8,7)(9,11)(10,13)(12,16)(14,15)(17,20)(18,23)(19,28)(21,29)(22,30)(24,31)(25,32)(26,27)(1,4,5,2)(3,6,8,7)(11,16)(13,15)(17,20)(18,24)(19,21)(22,30)(23,31)(25,27)(26,32)(28,29)(10,14)(13,15)(17,21,22,28)(18,25,26,31)(19,20,29,30)(23,32,27,24)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.