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