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