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