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