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