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