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