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