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