One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,10)(4,9)(5,7)(6,13)(8,11)(12,16)(14,15)(18,23)(21,33)(24,34)(25,35)(26,36)(27,40)(28,43)(30,44)(31,39)(37,47)(38,46)(41,45) involution — undirected(2,7)(8,15)(9,13)(10,16)(17,18,21,23,22,26,33,36)(19,24,28,34,29,38,43,46)(20,30,31,44,32,25,39,35)(27,41,42,47,40,37,48,45)(1,3)(2,8)(4,11)(5,12)(6,14)(7,15)(9,16)(10,13)(17,19)(18,24)(20,27)(21,28)(22,29)(23,34)(25,37)(26,38)(30,41)(31,42)(32,40)(33,43)(35,45)(36,46)(39,48)(44,47) involution — undirected(1,4,5,6)(2,9,7,13)(3,11,12,14)(8,16,15,10)(17,20)(18,25)(19,27)(21,31)(22,32)(23,35)(24,37)(26,30)(28,42)(29,40)(33,39)(34,45)(36,44)(38,41)(43,48)(46,47)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.