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