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