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