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