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