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