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