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