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