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