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