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