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