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