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