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