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