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