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