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