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