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