One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6)(7,11)(8,12)(9,13)(10,14)(15,19)(16,18)(17,20)(24,32)(26,35)(28,33)(30,34) involution — undirected(1,2,4,3)(5,7)(6,11)(8,16)(9,15)(10,17)(12,18)(13,19)(14,20)(21,22)(23,29)(24,33)(25,27)(26,30)(28,32)(31,36)(34,35)(6,12)(7,15)(8,9)(13,14)(16,17)(18,19)(21,23,25,31)(22,26,27,35)(24,34,32,30)(28,36,33,29)(1,3,4,2)(5,8,10,9)(6,12,14,13)(7,16,17,15)(11,18,20,19)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.