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