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