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