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