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