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