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