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