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