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