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