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