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