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