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)(19,20)(21,29)(22,23)(24,31)(25,28)(26,30)(27,32) involution — undirected(1,2)(3,8)(4,6)(5,7)(9,10,13,12)(11,14,16,15)(17,19,22,25)(18,20,23,28)(21,26,31,32)(24,27,29,30)(1,3,5,6)(2,4,7,8)(9,11)(10,14)(12,15)(13,16)(18,23)(19,25)(24,29)(26,32)(9,10,13,12)(11,15,16,14)(17,18)(19,20)(21,24)(22,23)(25,28)(26,27)(29,31)(30,32)(1,2)(3,4)(5,7)(6,8)(9,11)(10,15)(12,14)(13,16)(17,20)(18,19)(21,30)(22,28)(23,25)(24,32)(26,29)(27,31) involution — undirected(1,4)(2,6)(3,7)(5,8)(9,12,13,10)(11,15,16,14)(17,21)(18,24)(19,26)(20,27)(22,31)(23,29)(25,32)(28,30)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.