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