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