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