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