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)(19,23,28,29)(20,21,30,24)(26,27,31,32)(9,10)(11,14)(12,16)(13,15)(17,19)(18,23)(20,27)(21,31)(22,28)(24,26)(25,29)(30,32) involution — undirected(2,6)(7,8)(9,11,13,12)(10,14,15,16)(17,20,18,24,22,30,25,21)(19,26,29,27,28,31,23,32)(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,14,15,16)(1,4,5,3)(2,8,6,7)(9,12,13,11)(10,14,15,16)(17,21,25,30,22,24,18,20)(19,27,23,26,28,32,29,31)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.