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