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