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