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