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