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