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