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