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