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