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