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