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