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