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)(12,13)(14,16)(17,18)(19,25)(20,29)(21,30)(22,26)(23,32)(24,27)(28,31) involution — undirected(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,22,27)(18,24,26,25)(20,30,28,23)(21,29,32,31)(1,3,5,4)(2,7,6,8)(10,13)(14,15)(17,20,23,19,22,28,30,27)(18,25,21,29,26,24,32,31)(1,3,5,4)(2,7,6,8)(9,11,12,16)(10,14,13,15)(17,21,30,18,22,32,23,26)(19,25,20,31,27,24,28,29)(1,4,5,3)(2,7,6,8)(18,26)(21,32)(24,25)(29,31)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.