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