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