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