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