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