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