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