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