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