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