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