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