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