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