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